For the machines installed the development cooling system:
- The development unit cooling system circulates propylene glycol from a sealed tank through hoses that pass behind cooling plates on the sides of each development unit.
 - The coolant tank is located at the bottom of the cooling box on the back of the main machine.
 - Always obey local laws and regulations if you need to dispose of a tank or the propylene glycol coolant.
 - The tank must never be emptied directly into a local drainage system, river, pond, or lake.
 - Contact a professional industrial waste disposal organization and ask them to dispose of the tank.